/*
 * hello−1.c − The simplest kernel module.
 */
#include <linux/kernel.h> /* Needed for KERN_INFO */
#include <linux/module.h> /* Needed by all modules */

int init_module(void)
{
    printk(KERN_INFO "Hello world 1.\n");
    /*
     * A non 0 return means init_module failed; module can't be loaded.
     */
    return 0;
}
void cleanup_module(void) { printk(KERN_INFO "Goodbye world 1.\n"); }